you don't just "throw" the SSS on, you have to adjust the settings of it to fit your material
click on SSS in the tree, and you'll see many settings

carrara texture room is a bit more complicated than poser, wish it had nodes
would make my materials smaller :)

if you want fake SSS, theres a thread around 4 months back, i converted realskin best i could
but ofcourse nothing is as good as true SSS, i'd suggest reading the manual atleast :)